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Your search keyword '"Mironov, S."' showing total 84 results
Start Over Author "Mironov, S." Publication Type Conference Materials
84 results on '"Mironov, S."'

12. Modeling of the three-dimensional structure high-porosity cellular materials in supersonic flows.

Author

Poplavskaya, T. V., Valiullin, I. R., Kirilovskiy, S. V., Militsina, T. S., Mironov, S. G., Tsyryulnikov, I. S., Fomin, Vasily, and Shiplyuk, Alexander

Subjects
SUPERSONIC flow, THREE-dimensional modeling, CELL anatomy, SPATIAL arrangement, POROUS materials, DRAG coefficient
Abstract

A numerical simulation of a supersonic (M∞ = 7) flow around a cylinder with a front gas-permeable porous insert at a zero angle of attack was carried out using three-dimensional skeleton models of a highly porous cellular material made of non-intersecting hard spheres with a regular and chaotic arrangement of pores. A comparative analysis of these skeleton models with different spatial arrangement and pore size showed a weak influence of the structure of skeleton models on the resistance of a cylinder with a front gas-permeable insert. The computed data of the drag coefficient are compared with the results of tube experiments. [ABSTRACT FROM AUTHOR]

Published
2020
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13. Control of the drag of a cylinder with gas-permeable porous inserts by varying the base pressure.

Author

Mironov, S. G., Valiullin, I. R., Poplavskaya, T. V., Fomin, Vasily, and Shiplyuk, Alexander

Subjects
GLOW discharges, AIR flow, WIND tunnels, ELECTRIC discharges, POROUS materials, DRAG (Aerodynamics), DRAG force
Abstract

The problem of supersonic (M∞ = 7) flow around a hollow cylinder with end gas-permeable porous inserts located at a zero angle of attack is solved experimentally and numerically. In experiments in the wind tunnel, the end inserts are heated by an electric glow discharge to regulate the flow rate of air directed to the bottom region. Measurements of the air temperature in the bottom area and the aerodynamic drag of the model are performed. Numerical simulation of the problem was carried out by the ANSYS Fluent package using a ring skeleton model of a highly porous cellular material. It is shown that the heating of the end gas-permeable inserts leads to an increase in the air temperature in the bottom region, as a consequence to a decrease in the bottom pressure and an increase in the aerodynamic drag of the model. [ABSTRACT FROM AUTHOR]

Published
2020
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21. Optical Thin Film Compression for Laser Induced Plasma Diagnostics

Author

Masruri, M., primary, Wheeler, J., additional, Dancus, I., additional, Fabbri, R., additional, Nazîru, A., additional, Secareanu, R., additional, Ursescu, D., additional, Cojocaru, G., additional, Ungureanu, R., additional, Farinella, D., additional, Pittman, M., additional, Mironov, S., additional, Balascuta, S., additional, Doria, D., additional, Ros, D., additional, and Dabu, R., additional

Published
2019
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26. Control of Aerodynamic Forces on Bodies with Gaspermeable Porous Inserts in a Supersonic Flow.

Author

Mironov, S. G., Poplavskaya, T. V., Tsyryulnikov, I. S., and Kirilovskiy, S. V.

Subjects
SUPERSONIC flow, MACH number, FLOW simulations, WIND tunnels, DRAG (Aerodynamics), AERODYNAMIC load
Abstract

Results of experimental and numerical studies of a supersonic flow around a cylinder containing a highporosity gas-permeable frontal insert made of a cellular porous material, which is aligned at various angles of attack, are presented. The experiments are performed in a supersonic wind tunnel at a Mach number of 6.95 and moderate unit Reynolds numbers. It is demonstrated that the effect of drag reduction on a cylinder with a porous insert is also observed in the range of the angles of attack up to 15°. A three-dimensional skeleton model composed of densely packet intersecting hollow spheres for numerical simulation of the flow around a cylinder with a porous insert is proposed and tested. [ABSTRACT FROM AUTHOR]

Published
2019
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32. Cosmological bounce in Horndeski theory and beyond.

Author

Kolevatov, R., Mironov, S., Rubakov, V., Sukhov, N., and Volkova, V.

Subjects
GENERAL relativity (Physics), METAPHYSICAL cosmology, SCALAR field theory, ALGEBRAIC field theory, LAGRANGIAN functions
Abstract

We discuss the stability of the classical bouncing solutions in the general Horndeski theory and beyond Horndeski theory. We restate the no-go theorem, showing that in the general Horndeski theory there are no spatially flat non-singular cosmological solutions which are stable during entire evolution. We show the way to evade the no-go in beyond Horndeski theory and give two specific examples of bouncing solutions, whose asymptotic past and future or both are described by General Relativity (GR) with a conventional massless scalar field. Both solutions are free of any pathologies at all times. [ABSTRACT FROM AUTHOR]

Published
2018
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33. Towards wormhole beyond Horndeski.

Author

Mironov, S., Rubakov, V., and Volkova, V.

Subjects
WORMHOLES (Physics), WORMHOLE routing, ANGULAR momentum (Mechanics), METAPHYSICAL cosmology, TACHYONS
Abstract

We address the issue of whether a no-go theorem for static, spherically symmetric wormholes, proven in Horndeski theories, can be circumvented by going beyond Horndeski. We show that the ghost instabilities which are at the heart of the no-go theorem, can indeed be avoided. The wormhole solutions with the latter property are, however, strongly fine tuned, and hence it is likely that they are unstable. Furthermore, it remains unclear whether these solutions have other pathologies, like gradient instabilities along angular and radial directions. [ABSTRACT FROM AUTHOR]

Published
2018
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34. From a reversible code to the quantum one: R-matrix.

Author

Aharonov, Y., Bravina, L., Kabana, S., and Mironov, S.

Subjects
QUANTUM states, R-matrices, KNOT theory, MATHEMATICAL programming, NUCLEAR physics
Abstract

This research has been carried out in collaboration with D.Melnikov, A.Mironov, A.Morozov and An.Morozov. We study the relation between quantum programming and knot theory. The general idea is that knot theory provides a special basis for unitary matrices. We suggest to use R-matrices of knot theory as universal gates in quantum code. We also examine basic operations in reversible programming. [ABSTRACT FROM AUTHOR]

Published
2018
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43. Features of the Laminar-Turbulent Transition in Supersonic Axisymmetric Microjets.

Author

Maslov, A. A., Aniskin, V. M., and Mironov, S. G.

Subjects
LAMINAR flow, TURBULENCE, VERY light jets, AXIAL flow, SUPERSONIC flow
Abstract

In this paper, a supersonic core length of microjets is studied in terms of laminar-turbulent transition in the microjet mixing layer. Previously, it was discovered that this transition has a determining influence on the supersonic core length. A possibility of simulation of microjet flows is estimated through the use of Reynolds number computed by the nozzle diameter and the nozzle exit gas parameters. These experimental data were obtained using Pitot tube when the jets escaping from the nozzle of 0.6 mm into the low-pressure space. This experiment made it possible to achieve a large jet pressure ratio when the Reynolds number values were low which specify the microjets' behavior. The supersonic core length, phase of the laminar-turbulent transition and flow characteristics in the space are obtained. Such an approach provides simulation of the characteristics of microjets and macrojets, and also explains preliminary proposition and some data obtained for microjets. [ABSTRACT FROM AUTHOR]

Published
2016
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47. 200MeV electron bunch generated by PEtawatt pARametric Laser (PEARL)

Author

Ginzburg, V., primary, Katin, E. V., additional, Khazanov, E. A., additional, Kirsanov, A. V., additional, Lozhkarev, V. V., additional, Luchinin, G. A., additional, Mal'shakov, A. N., additional, Martyanov, M. A., additional, Mironov, S. Yu., additional, Palashov, O. V., additional, Poteomkin, A. K., additional, Sergeev, A. M., additional, Shaykin, A. A., additional, Soloviev, A. A., additional, Starodubtsev, M. V., additional, Yakovlev, I. V., additional, and Zelenogorsky, V. V., additional

Published
2010
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49. AVLIS of neodymium

Author

Grigoriev, I. S., primary, Diachkov, A. B., additional, Kovalevich, S. K., additional, Labosin, V. P., additional, Mironov, S. M., additional, Nikulin, S. A., additional, Pesnia, A. V., additional, Firsov, V. A., additional, Shatalova, G. G., additional, and Tsvetkov, G. O., additional

Published
2003
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